Vanessa from Google started a thread at Google Places Help saying Google is working on a fix for the "We do not support this location" bug within Google Maps/Places.
Vanessa started a new thread to let people know Google is aware of the issue and is working on it. She said:
A bunch of you have reported seeing "We currently do not support this location" on your listing. We're working on a fix right now and will keep you posted on progress.
Forum discussion at Google Places Help.